Patent GB-695270-A (GB)
Title: Improvements in or relating to a record controlled perforation punching machine
Filed: 1952-05-14
Abstract: 695,270. Selective punching-machines. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 14, 1952. [June 20, 1951] No. 12208/52. Class 31 (ii). In a record card punching-machine comprising rows of punch elements 22 and corresponding rows of interposers 19, one or more selected interposers in each row are set up for the punching operation by means of a cam surface 28 on a selector element 8 which is movable along the row of interposers. The selection of the punches for the punching operation is controlled by the code designations in cards which are advanced to an analysing station, Fig. 5 (not shown), which is in electrical connection with rows of magnets 1. Each row of magnets 1 is mounted on a frame member 2 and each magnet is provided with a spring-biased armature 3 having a depressed portion 3a with which co-acts a flange 4a on a slidably mounted selection 'interposer 4. When a magnet 1 is energized, the armature 3 moves to the left to release the selection interposer which is moved downwardly by a spring 5 to engage a tooth on a rack 6. The latter is pivotally suspended from the ends of legs 9a of bell cranks 9 pivotally mounted on an element 7 which is connected to the element 8 by means of the other legs 9b of the bell cranks and has fastened thereto a bar 16 attached to a roller 15 which is carried by a pivotally mounted operating arm 11 provided with rollers 74, 75 which are constantly engaged by cams 13, 14 secured to a main drive shaft 10. When the arm 11 is rocked by the cam 13, the bar 16 moves the assembly 7, 8 to the right. Release of the selection interposer 4, upon energization of the magnet 1, prevents further travel of the rack to the right. The bar 16, however, will continue to move to the right carrying the member 7 with it. This causes the bell cranks to swing about their pivots to raise the rack 6 and element 8. The cam surface 28 then engages an extension 19b located at the bottom of the selected interposer 19 thereby causing the interposer to be raised and forced to the right until it is seated in a cut-out portion 22b on the top of a related punch element 22. At the same time, the element 8, which rises faster than the rack 6, engages a shoulder 4b on the selection interposer 4 to disengage the interposer from the rack and raise it sufficiently to allow it to re-latch the depression 3a in the armature 3 upon de-energization of the magnet 1. A spring 29 then returns the element 8 to its normal position. The interposers 19 are guided by channel members 18 which slide in grooves 20 provided in cut-out central portions of side plates 65 fastened between cross bars 63, 64. Each interposer 19 has a lip 19a and a spring 21 which urges it downwardly. The punch elements 22 are slidably arranged in a common guide block 82 and each punch element is provided with a notch 22a and restoring bars 24 ride within the spaces formed by the notches. The restoring bars are mounted in supporting plates 25 which are secured to a ram 26. The latter is operated by a toggle link arrangement comprising follower rollers 41, 42 which are in continuous contact with cams 39, 40 on the drive shaft 10. The cam 39 causes downward movement of the ram so that one or more holes are punched in a card resting on the guide block 82. Subsequently, the cam 40 causes the ram to be moved upwardly and the bars 24 restore to normal position any punch elements which have been activated. Notched restoring bars 50 each operate in conjunction with draw bars 45 and a slidablv mounted bail 48 to restore the interposers 19. Secured to the bar 16 is an angle plate 66 having a rod 54 extending the entire width thereof. The vertical arm of the plate 66 has a series of cut-out portions in which reside a series of pawls 53 pivotally mounted on the rod 54. Springs 55 urge the pawls towards contact with the bar 50. When the bar 16 nears the completion of its return stroke, a pawl 53 is moved against its related restoring bar 50 thereby pushing it to the left. The movement of the restoring bar causes any interposer 19 which has been set up to be unseated from the top of its corresponding punch element 22. Each unseated interposer is then forced downwardly by its spring 21 to return it to the normal inoperative position. Also, near the completion of the return stroke of the bar 16, the draw bars 45 are engaged by the bar 16 forcing them to the left against the action of springs 47. The bail 48 is thereby moved to the left permitting movement of the bar 50 in the same direction. When the bar 16 is actuated for another punching operation, the bail 48 is returned by the action of the springs 47 and the restoring bar 50 is also returned by the bail 48 to permit the setting-up of one or more interposers 19 during the next card cycle. If it should be desired to retain information in selected columns for the purpose of repetition punching of common information in all cards, the restoring bars 50 are selectively locked by means of manually-operated lock bars 56. Specification 623,283, [Group XIX], is referred to.